Door closer and check.



, PATENTED APR.'16, 190v.

,co wAsnmaruN, 0. c.

C. RISCHMULLBR.

DOOR CLOSER AND CHECK.

APILIOATION FILED JUNE 7. 1905.

NITED STATES PATENT OFFTGiQl.

GEORGE RISOI-IMULLER, OF SAN FRANCISCO, CALIFORNIA.

DOOR CLOSER AND CHECK.

Specification of Letters Patent.

Batented April 16, 1907.

Application filed June '7, 1905. Serial No. 264,157.

Door Closers and Checks, of which the following is a specification.

This invention relates to improvements in door closers and checks, theinvention consisting in the novel construction, arrangement, andcombination of parts thereof.

In the accompanying drawings, Figure 1 is a vertical section on the line1 1' of Fig. 4. Fig. 2 is a side View of portions of the jamb and door,the latter open. Fig. 3 is a View similar to Fig. 1, showing the upperparts thereof in the position when the door is opened. Fig. 4 is ahorizontal section on the line 4 4 of Fig. 1. Fig. 5 is an enlargedvertical section through the cylinder. Fig. 6 is a horizontal section onthe line 6 6 of Fig. 5. Fig. 7 is a vertical section on the line 7 7 ofFig. 6.

Referring to the drawings, 1 2, indicate hinge-plates secured,respectively, to the door 3 and jamb 4 therefor. The hinge-plate 1 isformed with ears 5, between which is pivoted a short arm '6, which inits turn is pivoted to the end of a forked link-section 7, connected bya turnbuckle 8 'to a second forked link-section 9, pivoted to a shortarm 10, which in its turn is pivoted to the forked end of an arm 11 ofabell-crank lever 12, pivoted between cars 13, extending rearwardly fromthe hinge-plate 2.

Secured to the short arm of the bell-crank lever is the upper end of acoiled spring .14, the lower end of which is attached to a hook 15, thestem of which is threaded and passes loosely through a bearing 16 in abracket 17, extending rearwardly or inwardly from a plate 13, secured tothe door-jamb. Upon the lower end of said stem is'screwed a nut 19,having beveled teeth engaging the beveled teeth of a collar 20, securedupon the end of a shaft 21, turning in a bearin 22, formed in the lowerside of said bracket. The outer end of said shaft has a screw-head 23,so that it can be turned with a screwdriver, thereby rotating the nut 19upon the stem of the hook 15 and drawing down the spring 14, increasingits tension, or permitting it to rise, reducing the tension. Thehinge-plate 2 is out out and the jamb has a corresponding aperture, asshown at 24, to permit the compound link connectingthe plate 1 andbell-crank lever 12 to pass therethrough when the door is opened. Thisaperture 24 is sufliciently large to permit the check, lever, and linkto be passed therethrough, thereby enabling the apparatus to beassembled in the shop before being transported to the place to beused,where it can be easily secured in place by a few screws, said compoundarm comprising the two short arms 6 10. The links 7 9 and the turnbuckle8 can be adjusted in length by turning said turnbuckle.

It is evident that with this construction when the door is swung openthe tension of the spring will draw down the bell-crank lever andtransmit its force through said compound arm to the hinge-plate of thedoor to close the door.

In order to provide against too sudden closing of the door under theaction of the spring 14, there is employed a check, as follows: Thehinge-plate 2 is made of considerable length, as shown, and the lowerportion of it is formed with the rearwardly-extending rib 26 terminatingin a cylinder 27. In this cylinder slides a piston 28, attached by a rod29 to a link 30, secured to the short arm of a bell-crank lever. A gland31 is provided to pack said rod where it slides through the upper head32 of the cylinder, and the lower end of the cylinder is closed by ahead33. I The upper and lower portions of the liquid-chamber of thepiston-cylinder are connected by a conduit 34 in the rib 26, so thatwhen the door is closing and the piston is descending oil or otherliquid in the cylinder can pass freely from the lower portion to theupper portion, and the door can readily close up to the point when thelower end of the piston arrives at the lower edge of the conduit 34.From that time the oil can flow very slowly from-said portion, andconsequently the door will close slowly under the action of the. spring.In order to permit the oil to flow freely from the upper portion to thelower portion of the cylinder on opening the door, there is provided inthe piston a tortuous passage 35, including a valve-seat 36, upon whichrests a ball 37 in a valve-chamber 38, closed by a screw 39.

It is evident that when the oil is flowing from the upper to the lowerportion the ball 37 will be lifted and the oil can flow freely,

Ioo

while passage in the opposite direction will be prevented by said ballbeing pressed tightly to its seat.

40 indicates a rubber butter or stop for the bell-crank lever.

The cylinder is secured in place behind the jamb 4 and between it andthe casing 44, as shown in Fig. 4, whereby it is concealed from view,thus obviating the main objection to the use of door-checks, especiallyin artistic or highly-decorated rooms or apartments.

By providing the hinge-plate 2 with the ears 13 for pivoting thereon thelever 12 and with the rib 26 for supporting the cylinder 27 and byproviding the other hinge-plate 1 with the ears 5 for connecting theretothe link attached to the lever, the first hingeplate being apertured topermit said link to pass therethrough, it is insured that the parts mustnecessarily be attached to the door and jamb, respectively, so that thewhole device may operate as el'liciently as possible. Thus the apparatusrequires no experience or skill. whatever in securing it in the bestposition.

I cl aim 1. In a door closer, the combination, with the jamb having anaperture, of a two-armed lever pivoted at the rear of the jamb, a linkconnected with one arm of said lever, a plate secured to the hinged sideof the door and provided with means to permit said link to be pivotallyconnected thereto, a spring attached at one end to the other arm of saidlever, a fixed device with which the other end of the spring isconnected, and means for adjusting the length of said link,substantially as described.

2. In a door closer and check, the combination with a jamb having anaperture, of a correspondingly aperture'd hinge plate secured thereto, ahinge-plate secured to the door and pivotally connected to thejambplate, a two-armed lever pivoted to the rear of the jamb-plate toswing vertically thereon, a link passing through said apertures andpivotally connected with one arm of the lever and with the door-plate, aspring attached to the other arm of said lever, a fixed device on therear of the jamb with which the other end of the spring is connected,and means for controlling the action of the spring, substantially asdescribed.

3. In a door closer and check, the combination with a jamb having anaperture, of a correspondingly-apertured plate secured thereto, a platesecured to the door, a twoarmed lever pivoted to the rear of thejambplate to swing vertically thereon, a link passing through saidapertures and movably connected with one arm of said lever, said armswinging into a position substantially parallel with said jamb-platewhen the door is open, a spring attached to the other arm of said leverbehind the amb and. operating to close the door, said other arm swingingthrough a horizontal position in closing the door, a fixed device on therear of the jamb with which the other end of the spring is connected,and means for controlling the action of the spring, substantially asdescribed.

4. In a door closer and check, the combination, with the jamb having anaperture, of a correspondingly-apertured plate secured to the jamb, alever having a long arm and a short arm, pivoted to the rear surface ofsaid plate to swing vertically thereon, a link connected with the longarm of the lever, a plate secured to the hinged side of the door andivotally connected with said link, a spring attached to the short arm ofthe lever behind the jamb and operating to close the door, and means"for controlling said spring, comprising a cylinder and a piston slidingtherein, one of the elements of said controlling mechanism beingoperatively connected with the short arm of the lever between the pivotand the spring, and the other element being connected with the plate,said cylinder being provid d with means for permitting the free movementof the piston in one direction, but obstructing the close of itsmovement in the opposite direction, substantially as described.

5. In a door closer and check, the combination, with a jamb having anaperture, of an apertured plate secured to the jamb, provided with tworearward projections, a lever pivotand a piston movable in saidcylinder; one of said check members being supported by the secondprojection, and the other cheek member being movably connected with thelever, a link movably connected with. said lever, and a second platesecured to the door and connected with said link, substantially as described.

6. In a door closer and check, the combination of an apertured plateprovided on one side with a fulcrum for a lever and with means forsupporting a checking device, a lever pivoted on said fulcrum, a checkcompris ing a cylinder and a piston whereof one member is secured tosaid supporting means and the other member is secured to said lever alink connected at one end to an arm of said lever and arranged to passthrough the aperture in the plate, a spring connected to said lever, adoor, and means for securing the other end of the link to the door, anda doorjamb to which said plate is secured, said j amb having an aperturesu'lliciently large to permit the check, lever, and link to be passedthereinto, substantially as described.

7. In a door closer and check, the combination of an a ertured plateprovided on one side with a lulcrum for a lever and with means forsupporting a check member, a lever pivoted on said fulcrum, a checkcomprising a cylinder and a piston whereof one memher is secured to saidsupporting means and the other member is secured to said lever, a

ed on the first projection, a check-cylinder link connected at one endto an arm of said a valve-seat, and a ball on said seat, substanleverand arranged to pass through the aperture in theplate, a springconnected to said lever, a door, and means for securing the other end ofthe link to the door, a second plate and means carried thereby forattaching the other end of the spring, and a doorjanib to which saidplate is secured, said j amb having an aperture su'lficiently large topermit the check, lever, and link to be passed thereinto, and havingalso an aperture. permitting the insertion of parts carried by thesecond plate, substantially as described.

8. In a door closer and check, the combination of a lever, an 0 erativeconnection between said lever an door for closing the same, a spring foroperating said. lever, and means for controlling the operation of saidspring, said means comprising a cylinder, a

piston sliding therein and operatively connected with said lever, thecylinder having a passage between the upper and lower portions thereofand the piston having a tortuous passage, formed with a valve-chamber,

the lower end of said valve-chamber forming tially as described.

9. In a door-closer, the combination of a lever pivotally secured behindthe jainb of the door, a link connected to said lever and to the door, aspring for operating said lever, and means for adjusting the tension ofsaid spring, comprising a hook attached to the end of the spring andthreaded at its other end, a nut on said. threaded end having bevelteeth, a bracket having a bearing through which the hook passes and alsohaving a bearing for a shaft, a shaft in said latter bearing havingbevel-teeth on its end engaging the bevel-teeth. on the nut, and meansprovided at the other end of the shaft for turning the same to move thehook longitudinally, substantially as described.

In witness whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

GEO. RISCHMULLER. Witnesses:

FRANCIS M. WRIGHT, BEssIE GORFINKEL.

